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source: palm/trunk/SOURCE/lpm_exchange_horiz.f90 @ 2130

Last change on this file since 2130 was 2101, checked in by suehring, 8 years ago
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[1873]	1	!> @file lpm_exchange_horiz.f90
[2000]	2	!------------------------------------------------------------------------------!
[1036]	3	! This file is part of PALM.
	4	!
[2000]	5	! PALM is free software: you can redistribute it and/or modify it under the
	6	! terms of the GNU General Public License as published by the Free Software
	7	! Foundation, either version 3 of the License, or (at your option) any later
	8	! version.
[1036]	9	!
	10	! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
	11	! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
	12	! A PARTICULAR PURPOSE. See the GNU General Public License for more details.
	13	!
	14	! You should have received a copy of the GNU General Public License along with
	15	! PALM. If not, see <http://www.gnu.org/licenses/>.
	16	!
[2101]	17	! Copyright 1997-2017 Leibniz Universitaet Hannover
[2000]	18	!------------------------------------------------------------------------------!
[1036]	19	!
[849]	20	! Current revisions:
	21	! ------------------
[1930]	22	!
[2001]	23	!
[1930]	24	! Former revisions:
	25	! -----------------
	26	! $Id: lpm_exchange_horiz.f90 2101 2017-01-05 16:42:31Z raasch $
	27	!
[2001]	28	! 2000 2016-08-20 18:09:15Z knoop
	29	! Forced header and separation lines into 80 columns
	30	!
[1937]	31	! 1936 2016-06-13 13:37:44Z suehring
	32	! Deallocation of unused memory
	33	!
[1930]	34	! 1929 2016-06-09 16:25:25Z suehring
[1929]	35	! Bugfixes:
	36	! - reallocation of new particles
	37	! ( did not work for small number of min_nr_particle )
	38	! - dynamical reallocation of north-south exchange arrays ( particles got lost )
	39	! - north-south exchange ( nr_move_north, nr_move_south were overwritten by zero )
	40	! - horizontal particle boundary conditions in serial mode
	41	!
	42	! Remove unused variables
	43	! Descriptions in variable declaration blocks added
[1321]	44	!
[1874]	45	! 1873 2016-04-18 14:50:06Z maronga
	46	! Module renamed (removed _mod)
	47	!
	48	!
[1851]	49	! 1850 2016-04-08 13:29:27Z maronga
	50	! Module renamed
	51	!
	52	!
[1823]	53	! 1822 2016-04-07 07:49:42Z hoffmann
	54	! Tails removed. Unused variables removed.
	55	!
[1784]	56	! 1783 2016-03-06 18:36:17Z raasch
	57	! new netcdf-module included
	58	!
[1692]	59	! 1691 2015-10-26 16:17:44Z maronga
	60	! Formatting corrections.
	61	!
[1686]	62	! 1685 2015-10-08 07:32:13Z raasch
	63	! bugfix concerning vertical index offset in case of ocean
	64	!
[1683]	65	! 1682 2015-10-07 23:56:08Z knoop
	66	! Code annotations made doxygen readable
	67	!
[1360]	68	! 1359 2014-04-11 17:15:14Z hoffmann
	69	! New particle structure integrated.
	70	! Kind definition added to all floating point numbers.
	71	!
[1329]	72	! 1327 2014-03-21 11:00:16Z raasch
	73	! -netcdf output queries
	74	!
[1321]	75	! 1320 2014-03-20 08:40:49Z raasch
[1320]	76	! ONLY-attribute added to USE-statements,
	77	! kind-parameters added to all INTEGER and REAL declaration statements,
	78	! kinds are defined in new module kinds,
	79	! comment fields (!:) to be used for variable explanations added to
	80	! all variable declaration statements
[849]	81	!
[1319]	82	! 1318 2014-03-17 13:35:16Z raasch
	83	! module interfaces removed
	84	!
[1037]	85	! 1036 2012-10-22 13:43:42Z raasch
	86	! code put under GPL (PALM 3.9)
	87	!
[852]	88	! 851 2012-03-15 14:32:58Z raasch
	89	! Bugfix: resetting of particle_mask and tail mask moved from end of this
	90	! routine to lpm
	91	!
[850]	92	! 849 2012-03-15 10:35:09Z raasch
	93	! initial revision (former part of advec_particles)
[849]	94	!
[850]	95	!
[849]	96	! Description:
	97	! ------------
[1822]	98	! Exchange of particles between the subdomains.
[849]	99	!------------------------------------------------------------------------------!
[1682]	100	MODULE lpm_exchange_horiz_mod
	101
[849]	102
[1320]	103	USE control_parameters, &
[1783]	104	ONLY: dz, message_string, simulated_time
[1320]	105
	106	USE cpulog, &
	107	ONLY: cpu_log, log_point_s
	108
	109	USE grid_variables, &
	110	ONLY: ddx, ddy, dx, dy
	111
	112	USE indices, &
[1359]	113	ONLY: nx, nxl, nxr, ny, nyn, nys, nzb, nzt
[1320]	114
	115	USE kinds
	116
[1359]	117	USE lpm_pack_arrays_mod, &
	118	ONLY: lpm_pack_arrays
	119
[1783]	120	USE netcdf_interface, &
	121	ONLY: netcdf_data_format
	122
[1320]	123	USE particle_attributes, &
[1822]	124	ONLY: alloc_factor, deleted_particles, grid_particles, &
	125	ibc_par_lr, ibc_par_ns, min_nr_particle, &
	126	mpi_particle_type, number_of_particles, &
	127	offset_ocean_nzt, offset_ocean_nzt_m1, particles, &
	128	particle_type, prt_count, trlp_count_sum, &
[1359]	129	trlp_count_recv_sum, trnp_count_sum, trnp_count_recv_sum, &
	130	trrp_count_sum, trrp_count_recv_sum, trsp_count_sum, &
[1822]	131	trsp_count_recv_sum, zero_particle
[1320]	132
[849]	133	USE pegrid
	134
	135	IMPLICIT NONE
	136
[1682]	137	INTEGER(iwp), PARAMETER :: NR_2_direction_move = 10000 !<
	138	INTEGER(iwp) :: nr_move_north !<
	139	INTEGER(iwp) :: nr_move_south !<
[1359]	140
[1929]	141	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: move_also_north
	142	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: move_also_south
[1359]	143
	144	SAVE
	145
	146	PRIVATE
[1936]	147	PUBLIC lpm_exchange_horiz, lpm_move_particle, realloc_particles_array, &
	148	dealloc_particles_array
[1359]	149
	150	INTERFACE lpm_exchange_horiz
	151	MODULE PROCEDURE lpm_exchange_horiz
	152	END INTERFACE lpm_exchange_horiz
	153
	154	INTERFACE lpm_move_particle
	155	MODULE PROCEDURE lpm_move_particle
	156	END INTERFACE lpm_move_particle
	157
	158	INTERFACE realloc_particles_array
	159	MODULE PROCEDURE realloc_particles_array
	160	END INTERFACE realloc_particles_array
	161
[1936]	162	INTERFACE dealloc_particles_array
	163	MODULE PROCEDURE dealloc_particles_array
	164	END INTERFACE dealloc_particles_array
[1359]	165	CONTAINS
	166
[1682]	167	!------------------------------------------------------------------------------!
	168	! Description:
	169	! ------------
	170	!> Exchange between subdomains.
	171	!> As soon as one particle has moved beyond the boundary of the domain, it
	172	!> is included in the relevant transfer arrays and marked for subsequent
	173	!> deletion on this PE.
	174	!> First sweep for crossings in x direction. Find out first the number of
	175	!> particles to be transferred and allocate temporary arrays needed to store
	176	!> them.
	177	!> For a one-dimensional decomposition along y, no transfer is necessary,
	178	!> because the particle remains on the PE, but the particle coordinate has to
	179	!> be adjusted.
	180	!------------------------------------------------------------------------------!
[1359]	181	SUBROUTINE lpm_exchange_horiz
	182
	183	IMPLICIT NONE
	184
[1929]	185	INTEGER(iwp) :: i !< grid index (x) of particle positition
	186	INTEGER(iwp) :: ip !< index variable along x
	187	INTEGER(iwp) :: j !< grid index (y) of particle positition
	188	INTEGER(iwp) :: jp !< index variable along y
	189	INTEGER(iwp) :: kp !< index variable along z
	190	INTEGER(iwp) :: n !< particle index variable
	191	INTEGER(iwp) :: trlp_count !< number of particles send to left PE
	192	INTEGER(iwp) :: trlp_count_recv !< number of particles receive from right PE
	193	INTEGER(iwp) :: trnp_count !< number of particles send to north PE
	194	INTEGER(iwp) :: trnp_count_recv !< number of particles receive from south PE
	195	INTEGER(iwp) :: trrp_count !< number of particles send to right PE
	196	INTEGER(iwp) :: trrp_count_recv !< number of particles receive from left PE
	197	INTEGER(iwp) :: trsp_count !< number of particles send to south PE
	198	INTEGER(iwp) :: trsp_count_recv !< number of particles receive from north PE
[849]	199
[1929]	200	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: rvlp !< particles received from right PE
	201	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: rvnp !< particles received from south PE
	202	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: rvrp !< particles received from left PE
	203	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: rvsp !< particles received from north PE
	204	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: trlp !< particles send to left PE
	205	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: trnp !< particles send to north PE
	206	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: trrp !< particles send to right PE
	207	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: trsp !< particles send to south PE
[849]	208
[1359]	209	CALL cpu_log( log_point_s(23), 'lpm_exchange_horiz', 'start' )
	210
[849]	211	#if defined( __parallel )
	212
[1822]	213	!
	214	!-- Exchange between subdomains.
	215	!-- As soon as one particle has moved beyond the boundary of the domain, it
	216	!-- is included in the relevant transfer arrays and marked for subsequent
	217	!-- deletion on this PE.
	218	!-- First sweep for crossings in x direction. Find out first the number of
	219	!-- particles to be transferred and allocate temporary arrays needed to store
	220	!-- them.
	221	!-- For a one-dimensional decomposition along y, no transfer is necessary,
	222	!-- because the particle remains on the PE, but the particle coordinate has to
	223	!-- be adjusted.
[849]	224	trlp_count = 0
	225	trrp_count = 0
	226
	227	trlp_count_recv = 0
	228	trrp_count_recv = 0
	229
	230	IF ( pdims(1) /= 1 ) THEN
	231	!
[1359]	232	!-- First calculate the storage necessary for sending and receiving the data.
	233	!-- Compute only first (nxl) and last (nxr) loop iterration.
	234	DO ip = nxl, nxr, nxr - nxl
	235	DO jp = nys, nyn
	236	DO kp = nzb+1, nzt
[849]	237
[1359]	238	number_of_particles = prt_count(kp,jp,ip)
	239	IF ( number_of_particles <= 0 ) CYCLE
	240	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	241	DO n = 1, number_of_particles
	242	IF ( particles(n)%particle_mask ) THEN
	243	i = ( particles(n)%x + 0.5_wp * dx ) * ddx
[1929]	244	!
	245	!-- Above calculation does not work for indices less than zero
[1359]	246	IF ( particles(n)%x < -0.5_wp * dx ) i = -1
	247
	248	IF ( i < nxl ) THEN
	249	trlp_count = trlp_count + 1
	250	ELSEIF ( i > nxr ) THEN
	251	trrp_count = trrp_count + 1
	252	ENDIF
	253	ENDIF
	254	ENDDO
	255
	256	ENDDO
	257	ENDDO
[849]	258	ENDDO
	259
	260	IF ( trlp_count == 0 ) trlp_count = 1
	261	IF ( trrp_count == 0 ) trrp_count = 1
	262
	263	ALLOCATE( trlp(trlp_count), trrp(trrp_count) )
	264
[1359]	265	trlp = zero_particle
	266	trrp = zero_particle
[849]	267
	268	trlp_count = 0
	269	trrp_count = 0
	270
	271	ENDIF
[1359]	272	!
	273	!-- Compute only first (nxl) and last (nxr) loop iterration
[1929]	274	DO ip = nxl, nxr, nxr-nxl
[1359]	275	DO jp = nys, nyn
	276	DO kp = nzb+1, nzt
	277	number_of_particles = prt_count(kp,jp,ip)
	278	IF ( number_of_particles <= 0 ) CYCLE
	279	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	280	DO n = 1, number_of_particles
	281	!
	282	!-- Only those particles that have not been marked as 'deleted' may
	283	!-- be moved.
	284	IF ( particles(n)%particle_mask ) THEN
[849]	285
[1359]	286	i = ( particles(n)%x + 0.5_wp * dx ) * ddx
[1929]	287	!
	288	!-- Above calculation does not work for indices less than zero
[1359]	289	IF ( particles(n)%x < - 0.5_wp * dx ) i = -1
[849]	290
[1359]	291	IF ( i < nxl ) THEN
	292	IF ( i < 0 ) THEN
[1929]	293	!
	294	!-- Apply boundary condition along x
[1359]	295	IF ( ibc_par_lr == 0 ) THEN
[1929]	296	!
	297	!-- Cyclic condition
[1359]	298	IF ( pdims(1) == 1 ) THEN
	299	particles(n)%x = ( nx + 1 ) * dx + particles(n)%x
	300	particles(n)%origin_x = ( nx + 1 ) * dx + &
	301	particles(n)%origin_x
	302	ELSE
	303	trlp_count = trlp_count + 1
	304	trlp(trlp_count) = particles(n)
	305	trlp(trlp_count)%x = ( nx + 1 ) * dx + trlp(trlp_count)%x
	306	trlp(trlp_count)%origin_x = trlp(trlp_count)%origin_x + &
	307	( nx + 1 ) * dx
	308	particles(n)%particle_mask = .FALSE.
	309	deleted_particles = deleted_particles + 1
[849]	310
[1359]	311	IF ( trlp(trlp_count)%x >= (nx + 0.5_wp)* dx - 1.0E-12_wp ) THEN
	312	trlp(trlp_count)%x = trlp(trlp_count)%x - 1.0E-10_wp
	313	!++ why is 1 subtracted in next statement???
	314	trlp(trlp_count)%origin_x = trlp(trlp_count)%origin_x - 1
	315	ENDIF
[849]	316
[1359]	317	ENDIF
[849]	318
[1359]	319	ELSEIF ( ibc_par_lr == 1 ) THEN
[1929]	320	!
	321	!-- Particle absorption
[1359]	322	particles(n)%particle_mask = .FALSE.
	323	deleted_particles = deleted_particles + 1
[849]	324
[1359]	325	ELSEIF ( ibc_par_lr == 2 ) THEN
[1929]	326	!
	327	!-- Particle reflection
[1359]	328	particles(n)%x = -particles(n)%x
	329	particles(n)%speed_x = -particles(n)%speed_x
[849]	330
[1359]	331	ENDIF
	332	ELSE
[1929]	333	!
	334	!-- Store particle data in the transfer array, which will be
	335	!-- send to the neighbouring PE
[1359]	336	trlp_count = trlp_count + 1
	337	trlp(trlp_count) = particles(n)
	338	particles(n)%particle_mask = .FALSE.
	339	deleted_particles = deleted_particles + 1
[849]	340
[1359]	341	ENDIF
[849]	342
[1359]	343	ELSEIF ( i > nxr ) THEN
	344	IF ( i > nx ) THEN
[1929]	345	!
	346	!-- Apply boundary condition along x
[1359]	347	IF ( ibc_par_lr == 0 ) THEN
[1929]	348	!
	349	!-- Cyclic condition
[1359]	350	IF ( pdims(1) == 1 ) THEN
	351	particles(n)%x = particles(n)%x - ( nx + 1 ) * dx
	352	particles(n)%origin_x = particles(n)%origin_x - &
	353	( nx + 1 ) * dx
	354	ELSE
	355	trrp_count = trrp_count + 1
	356	trrp(trrp_count) = particles(n)
	357	trrp(trrp_count)%x = trrp(trrp_count)%x - ( nx + 1 ) * dx
	358	trrp(trrp_count)%origin_x = trrp(trrp_count)%origin_x - &
	359	( nx + 1 ) * dx
	360	particles(n)%particle_mask = .FALSE.
	361	deleted_particles = deleted_particles + 1
[849]	362
[1359]	363	ENDIF
[849]	364
[1359]	365	ELSEIF ( ibc_par_lr == 1 ) THEN
[1929]	366	!
	367	!-- Particle absorption
[1359]	368	particles(n)%particle_mask = .FALSE.
	369	deleted_particles = deleted_particles + 1
[849]	370
[1359]	371	ELSEIF ( ibc_par_lr == 2 ) THEN
[1929]	372	!
	373	!-- Particle reflection
[1359]	374	particles(n)%x = 2 * ( nx * dx ) - particles(n)%x
	375	particles(n)%speed_x = -particles(n)%speed_x
[849]	376
[1359]	377	ENDIF
	378	ELSE
[1929]	379	!
	380	!-- Store particle data in the transfer array, which will be send
	381	!-- to the neighbouring PE
[1359]	382	trrp_count = trrp_count + 1
	383	trrp(trrp_count) = particles(n)
	384	particles(n)%particle_mask = .FALSE.
	385	deleted_particles = deleted_particles + 1
[849]	386
[1359]	387	ENDIF
[849]	388
[1359]	389	ENDIF
	390	ENDIF
[1929]	391
[1359]	392	ENDDO
	393	ENDDO
	394	ENDDO
[849]	395	ENDDO
	396
	397	!
[1929]	398	!-- Allocate arrays required for north-south exchange, as these
	399	!-- are used directly after particles are exchange along x-direction.
	400	ALLOCATE( move_also_north(1:NR_2_direction_move) )
	401	ALLOCATE( move_also_south(1:NR_2_direction_move) )
	402
	403	nr_move_north = 0
	404	nr_move_south = 0
	405	!
[849]	406	!-- Send left boundary, receive right boundary (but first exchange how many
	407	!-- and check, if particle storage must be extended)
	408	IF ( pdims(1) /= 1 ) THEN
	409
	410	CALL MPI_SENDRECV( trlp_count, 1, MPI_INTEGER, pleft, 0, &
	411	trrp_count_recv, 1, MPI_INTEGER, pright, 0, &
	412	comm2d, status, ierr )
	413
[1359]	414	ALLOCATE(rvrp(MAX(1,trrp_count_recv)))
[849]	415
[1359]	416	CALL MPI_SENDRECV( trlp(1)%radius, max(1,trlp_count), mpi_particle_type,&
	417	pleft, 1, rvrp(1)%radius, &
	418	max(1,trrp_count_recv), mpi_particle_type, pright, 1,&
[849]	419	comm2d, status, ierr )
	420
[1359]	421	IF ( trrp_count_recv > 0 ) CALL Add_particles_to_gridcell(rvrp(1:trrp_count_recv))
	422
	423	DEALLOCATE(rvrp)
	424
[849]	425	!
	426	!-- Send right boundary, receive left boundary
	427	CALL MPI_SENDRECV( trrp_count, 1, MPI_INTEGER, pright, 0, &
	428	trlp_count_recv, 1, MPI_INTEGER, pleft, 0, &
	429	comm2d, status, ierr )
	430
[1359]	431	ALLOCATE(rvlp(MAX(1,trlp_count_recv)))
[849]	432
[1359]	433	CALL MPI_SENDRECV( trrp(1)%radius, max(1,trrp_count), mpi_particle_type,&
	434	pright, 1, rvlp(1)%radius, &
	435	max(1,trlp_count_recv), mpi_particle_type, pleft, 1, &
[849]	436	comm2d, status, ierr )
	437
[1359]	438	IF ( trlp_count_recv > 0 ) CALL Add_particles_to_gridcell(rvlp(1:trlp_count_recv))
	439
[1822]	440	DEALLOCATE( rvlp )
[1359]	441	DEALLOCATE( trlp, trrp )
[849]	442
	443	ENDIF
	444
	445	!
	446	!-- Check whether particles have crossed the boundaries in y direction. Note
	447	!-- that this case can also apply to particles that have just been received
	448	!-- from the adjacent right or left PE.
	449	!-- Find out first the number of particles to be transferred and allocate
	450	!-- temporary arrays needed to store them.
[1929]	451	!-- For a one-dimensional decomposition along y, no transfer is necessary,
[849]	452	!-- because the particle remains on the PE.
[1359]	453	trsp_count = nr_move_south
	454	trnp_count = nr_move_north
[849]	455
	456	trsp_count_recv = 0
	457	trnp_count_recv = 0
	458
	459	IF ( pdims(2) /= 1 ) THEN
	460	!
	461	!-- First calculate the storage necessary for sending and receiving the
	462	!-- data
[1359]	463	DO ip = nxl, nxr
[1929]	464	DO jp = nys, nyn, nyn-nys !compute only first (nys) and last (nyn) loop iterration
[1359]	465	DO kp = nzb+1, nzt
	466	number_of_particles = prt_count(kp,jp,ip)
	467	IF ( number_of_particles <= 0 ) CYCLE
	468	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	469	DO n = 1, number_of_particles
	470	IF ( particles(n)%particle_mask ) THEN
	471	j = ( particles(n)%y + 0.5_wp * dy ) * ddy
[849]	472	!
[1359]	473	!-- Above calculation does not work for indices less than zero
	474	IF ( particles(n)%y < -0.5_wp * dy ) j = -1
[849]	475
[1359]	476	IF ( j < nys ) THEN
	477	trsp_count = trsp_count + 1
	478	ELSEIF ( j > nyn ) THEN
	479	trnp_count = trnp_count + 1
	480	ENDIF
	481	ENDIF
	482	ENDDO
	483	ENDDO
	484	ENDDO
[849]	485	ENDDO
	486
	487	IF ( trsp_count == 0 ) trsp_count = 1
	488	IF ( trnp_count == 0 ) trnp_count = 1
	489
	490	ALLOCATE( trsp(trsp_count), trnp(trnp_count) )
	491
[1359]	492	trsp = zero_particle
	493	trnp = zero_particle
[849]	494
[1359]	495	trsp_count = nr_move_south
	496	trnp_count = nr_move_north
[1929]	497
[1359]	498	trsp(1:nr_move_south) = move_also_south(1:nr_move_south)
	499	trnp(1:nr_move_north) = move_also_north(1:nr_move_north)
	500
[849]	501	ENDIF
	502
[1359]	503	DO ip = nxl, nxr
	504	DO jp = nys, nyn, nyn-nys ! compute only first (nys) and last (nyn) loop iterration
	505	DO kp = nzb+1, nzt
	506	number_of_particles = prt_count(kp,jp,ip)
	507	IF ( number_of_particles <= 0 ) CYCLE
	508	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	509	DO n = 1, number_of_particles
[849]	510	!
[1359]	511	!-- Only those particles that have not been marked as 'deleted' may
	512	!-- be moved.
	513	IF ( particles(n)%particle_mask ) THEN
[1929]	514
[1359]	515	j = ( particles(n)%y + 0.5_wp * dy ) * ddy
[849]	516	!
[1359]	517	!-- Above calculation does not work for indices less than zero
	518	IF ( particles(n)%y < -0.5_wp * dy ) j = -1
[849]	519
[1359]	520	IF ( j < nys ) THEN
	521	IF ( j < 0 ) THEN
[849]	522	!
[1359]	523	!-- Apply boundary condition along y
	524	IF ( ibc_par_ns == 0 ) THEN
[849]	525	!
[1359]	526	!-- Cyclic condition
	527	IF ( pdims(2) == 1 ) THEN
	528	particles(n)%y = ( ny + 1 ) * dy + particles(n)%y
	529	particles(n)%origin_y = ( ny + 1 ) * dy + &
[1929]	530	particles(n)%origin_y
[1359]	531	ELSE
[1929]	532	trsp_count = trsp_count + 1
	533	trsp(trsp_count) = particles(n)
[1359]	534	trsp(trsp_count)%y = ( ny + 1 ) * dy + &
[1929]	535	trsp(trsp_count)%y
[1359]	536	trsp(trsp_count)%origin_y = trsp(trsp_count)%origin_y &
[1929]	537	+ ( ny + 1 ) * dy
[1359]	538	particles(n)%particle_mask = .FALSE.
	539	deleted_particles = deleted_particles + 1
[849]	540
[1359]	541	IF ( trsp(trsp_count)%y >= (ny+0.5_wp)* dy - 1.0E-12_wp ) THEN
	542	trsp(trsp_count)%y = trsp(trsp_count)%y - 1.0E-10_wp
	543	!++ why is 1 subtracted in next statement???
	544	trsp(trsp_count)%origin_y = &
[1929]	545	trsp(trsp_count)%origin_y - 1
[1359]	546	ENDIF
[849]	547
[1359]	548	ENDIF
[849]	549
[1359]	550	ELSEIF ( ibc_par_ns == 1 ) THEN
[849]	551	!
[1359]	552	!-- Particle absorption
	553	particles(n)%particle_mask = .FALSE.
[1929]	554	deleted_particles = deleted_particles + 1
[849]	555
[1359]	556	ELSEIF ( ibc_par_ns == 2 ) THEN
[849]	557	!
[1359]	558	!-- Particle reflection
	559	particles(n)%y = -particles(n)%y
	560	particles(n)%speed_y = -particles(n)%speed_y
[849]	561
[1359]	562	ENDIF
	563	ELSE
[849]	564	!
[1359]	565	!-- Store particle data in the transfer array, which will
	566	!-- be send to the neighbouring PE
	567	trsp_count = trsp_count + 1
	568	trsp(trsp_count) = particles(n)
	569	particles(n)%particle_mask = .FALSE.
	570	deleted_particles = deleted_particles + 1
[849]	571
[1359]	572	ENDIF
[849]	573
[1359]	574	ELSEIF ( j > nyn ) THEN
	575	IF ( j > ny ) THEN
[849]	576	!
[1929]	577	!-- Apply boundary condition along y
[1359]	578	IF ( ibc_par_ns == 0 ) THEN
[849]	579	!
[1359]	580	!-- Cyclic condition
	581	IF ( pdims(2) == 1 ) THEN
[1929]	582	particles(n)%y = particles(n)%y - ( ny + 1 ) * dy
[1359]	583	particles(n)%origin_y = &
[1929]	584	particles(n)%origin_y - ( ny + 1 ) * dy
[1359]	585	ELSE
[1929]	586	trnp_count = trnp_count + 1
	587	trnp(trnp_count) = particles(n)
[1359]	588	trnp(trnp_count)%y = &
[1929]	589	trnp(trnp_count)%y - ( ny + 1 ) * dy
[1359]	590	trnp(trnp_count)%origin_y = &
[1929]	591	trnp(trnp_count)%origin_y - ( ny + 1 ) * dy
[1359]	592	particles(n)%particle_mask = .FALSE.
[1929]	593	deleted_particles = deleted_particles + 1
[1359]	594	ENDIF
[849]	595
[1359]	596	ELSEIF ( ibc_par_ns == 1 ) THEN
[849]	597	!
[1359]	598	!-- Particle absorption
	599	particles(n)%particle_mask = .FALSE.
	600	deleted_particles = deleted_particles + 1
[849]	601
[1359]	602	ELSEIF ( ibc_par_ns == 2 ) THEN
[849]	603	!
[1359]	604	!-- Particle reflection
	605	particles(n)%y = 2 * ( ny * dy ) - particles(n)%y
	606	particles(n)%speed_y = -particles(n)%speed_y
[849]	607
[1359]	608	ENDIF
	609	ELSE
[849]	610	!
[1359]	611	!-- Store particle data in the transfer array, which will
	612	!-- be send to the neighbouring PE
	613	trnp_count = trnp_count + 1
	614	trnp(trnp_count) = particles(n)
	615	particles(n)%particle_mask = .FALSE.
	616	deleted_particles = deleted_particles + 1
[849]	617
[1359]	618	ENDIF
	619
	620	ENDIF
[849]	621	ENDIF
[1359]	622	ENDDO
	623	ENDDO
	624	ENDDO
[849]	625	ENDDO
	626
	627	!
	628	!-- Send front boundary, receive back boundary (but first exchange how many
	629	!-- and check, if particle storage must be extended)
	630	IF ( pdims(2) /= 1 ) THEN
	631
	632	CALL MPI_SENDRECV( trsp_count, 1, MPI_INTEGER, psouth, 0, &
	633	trnp_count_recv, 1, MPI_INTEGER, pnorth, 0, &
	634	comm2d, status, ierr )
	635
[1359]	636	ALLOCATE(rvnp(MAX(1,trnp_count_recv)))
[1929]	637
[1359]	638	CALL MPI_SENDRECV( trsp(1)%radius, trsp_count, mpi_particle_type, &
	639	psouth, 1, rvnp(1)%radius, &
[849]	640	trnp_count_recv, mpi_particle_type, pnorth, 1, &
	641	comm2d, status, ierr )
	642
[1359]	643	IF ( trnp_count_recv > 0 ) CALL Add_particles_to_gridcell(rvnp(1:trnp_count_recv))
	644
	645	DEALLOCATE(rvnp)
	646
[849]	647	!
	648	!-- Send back boundary, receive front boundary
	649	CALL MPI_SENDRECV( trnp_count, 1, MPI_INTEGER, pnorth, 0, &
	650	trsp_count_recv, 1, MPI_INTEGER, psouth, 0, &
	651	comm2d, status, ierr )
	652
[1359]	653	ALLOCATE(rvsp(MAX(1,trsp_count_recv)))
[849]	654
[1359]	655	CALL MPI_SENDRECV( trnp(1)%radius, trnp_count, mpi_particle_type, &
	656	pnorth, 1, rvsp(1)%radius, &
[849]	657	trsp_count_recv, mpi_particle_type, psouth, 1, &
	658	comm2d, status, ierr )
	659
[1359]	660	IF ( trsp_count_recv > 0 ) CALL Add_particles_to_gridcell(rvsp(1:trsp_count_recv))
	661
	662	DEALLOCATE(rvsp)
	663
[849]	664	number_of_particles = number_of_particles + trsp_count_recv
	665
	666	DEALLOCATE( trsp, trnp )
	667
	668	ENDIF
	669
[1929]	670	DEALLOCATE( move_also_north )
	671	DEALLOCATE( move_also_south )
	672
[849]	673	#else
	674
[1929]	675	DO ip = nxl, nxr, nxr-nxl
	676	DO jp = nys, nyn
	677	DO kp = nzb+1, nzt
	678	number_of_particles = prt_count(kp,jp,ip)
	679	IF ( number_of_particles <= 0 ) CYCLE
	680	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	681	DO n = 1, number_of_particles
[849]	682	!
[1929]	683	!-- Apply boundary conditions
[849]	684
[1929]	685	IF ( particles(n)%x < -0.5_wp * dx ) THEN
[849]	686
[1929]	687	IF ( ibc_par_lr == 0 ) THEN
[849]	688	!
[1929]	689	!-- Cyclic boundary. Relevant coordinate has to be changed.
	690	particles(n)%x = ( nx + 1 ) * dx + particles(n)%x
[1822]	691
[1929]	692	ELSEIF ( ibc_par_lr == 1 ) THEN
[849]	693	!
[1929]	694	!-- Particle absorption
	695	particles(n)%particle_mask = .FALSE.
	696	deleted_particles = deleted_particles + 1
[1822]	697
[1929]	698	ELSEIF ( ibc_par_lr == 2 ) THEN
[849]	699	!
[1929]	700	!-- Particle reflection
	701	particles(n)%x = -dx - particles(n)%x
	702	particles(n)%speed_x = -particles(n)%speed_x
	703	ENDIF
[849]	704
[1929]	705	ELSEIF ( particles(n)%x >= ( nx + 0.5_wp ) * dx ) THEN
[849]	706
[1929]	707	IF ( ibc_par_lr == 0 ) THEN
[849]	708	!
[1929]	709	!-- Cyclic boundary. Relevant coordinate has to be changed.
	710	particles(n)%x = particles(n)%x - ( nx + 1 ) * dx
[1822]	711
[1929]	712	ELSEIF ( ibc_par_lr == 1 ) THEN
[849]	713	!
[1929]	714	!-- Particle absorption
	715	particles(n)%particle_mask = .FALSE.
	716	deleted_particles = deleted_particles + 1
[1822]	717
[1929]	718	ELSEIF ( ibc_par_lr == 2 ) THEN
[849]	719	!
[1929]	720	!-- Particle reflection
	721	particles(n)%x = ( nx + 1 ) * dx - particles(n)%x
	722	particles(n)%speed_x = -particles(n)%speed_x
	723	ENDIF
[849]	724
[1929]	725	ENDIF
	726	ENDDO
	727	ENDDO
	728	ENDDO
	729	ENDDO
[849]	730
[1929]	731	DO ip = nxl, nxr
	732	DO jp = nys, nyn, nyn-nys
	733	DO kp = nzb+1, nzt
	734	number_of_particles = prt_count(kp,jp,ip)
	735	IF ( number_of_particles <= 0 ) CYCLE
	736	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	737	DO n = 1, number_of_particles
[849]	738
[1929]	739	IF ( particles(n)%y < -0.5_wp * dy ) THEN
	740
	741	IF ( ibc_par_ns == 0 ) THEN
[849]	742	!
[1929]	743	!-- Cyclic boundary. Relevant coordinate has to be changed.
	744	particles(n)%y = ( ny + 1 ) * dy + particles(n)%y
[1822]	745
[1929]	746	ELSEIF ( ibc_par_ns == 1 ) THEN
[849]	747	!
[1929]	748	!-- Particle absorption
	749	particles(n)%particle_mask = .FALSE.
	750	deleted_particles = deleted_particles + 1
[1822]	751
[1929]	752	ELSEIF ( ibc_par_ns == 2 ) THEN
[849]	753	!
[1929]	754	!-- Particle reflection
	755	particles(n)%y = -dy - particles(n)%y
	756	particles(n)%speed_y = -particles(n)%speed_y
	757	ENDIF
[849]	758
[1929]	759	ELSEIF ( particles(n)%y >= ( ny + 0.5_wp ) * dy ) THEN
[849]	760
[1929]	761	IF ( ibc_par_ns == 0 ) THEN
[849]	762	!
[1929]	763	!-- Cyclic boundary. Relevant coordinate has to be changed.
	764	particles(n)%y = particles(n)%y - ( ny + 1 ) * dy
[1822]	765
[1929]	766	ELSEIF ( ibc_par_ns == 1 ) THEN
[849]	767	!
[1929]	768	!-- Particle absorption
	769	particles(n)%particle_mask = .FALSE.
	770	deleted_particles = deleted_particles + 1
[1822]	771
[1929]	772	ELSEIF ( ibc_par_ns == 2 ) THEN
[849]	773	!
[1929]	774	!-- Particle reflection
	775	particles(n)%y = ( ny + 1 ) * dy - particles(n)%y
	776	particles(n)%speed_y = -particles(n)%speed_y
	777	ENDIF
[849]	778
[1929]	779	ENDIF
	780
	781	ENDDO
	782	ENDDO
	783	ENDDO
[849]	784	ENDDO
	785	#endif
	786
	787	!
	788	!-- Accumulate the number of particles transferred between the subdomains
	789	#if defined( __parallel )
	790	trlp_count_sum = trlp_count_sum + trlp_count
	791	trlp_count_recv_sum = trlp_count_recv_sum + trlp_count_recv
	792	trrp_count_sum = trrp_count_sum + trrp_count
	793	trrp_count_recv_sum = trrp_count_recv_sum + trrp_count_recv
	794	trsp_count_sum = trsp_count_sum + trsp_count
	795	trsp_count_recv_sum = trsp_count_recv_sum + trsp_count_recv
	796	trnp_count_sum = trnp_count_sum + trnp_count
	797	trnp_count_recv_sum = trnp_count_recv_sum + trnp_count_recv
	798	#endif
	799
[1359]	800	CALL cpu_log( log_point_s(23), 'lpm_exchange_horiz', 'stop' )
[849]	801
	802	END SUBROUTINE lpm_exchange_horiz
[1359]	803
[1682]	804	!------------------------------------------------------------------------------!
	805	! Description:
	806	! ------------
	807	!> If a particle moves from one processor to another, this subroutine moves
	808	!> the corresponding elements from the particle arrays of the old grid cells
	809	!> to the particle arrays of the new grid cells.
	810	!------------------------------------------------------------------------------!
[1359]	811	SUBROUTINE Add_particles_to_gridcell (particle_array)
	812
	813	IMPLICIT NONE
	814
[1929]	815	INTEGER(iwp) :: ip !< grid index (x) of particle
	816	INTEGER(iwp) :: jp !< grid index (x) of particle
	817	INTEGER(iwp) :: kp !< grid index (x) of particle
	818	INTEGER(iwp) :: n !< index variable of particle
	819	INTEGER(iwp) :: pindex !< dummy argument for new number of particles per grid box
[1359]	820
[1682]	821	LOGICAL :: pack_done !<
[1359]	822
[1929]	823	TYPE(particle_type), DIMENSION(:), INTENT(IN) :: particle_array !< new particles in a grid box
	824	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: temp_ns !< temporary particle array for reallocation
[1359]	825
	826	pack_done = .FALSE.
	827
[1929]	828	DO n = 1, SIZE(particle_array)
[1359]	829
[1929]	830	IF ( .NOT. particle_array(n)%particle_mask ) CYCLE
	831
[1359]	832	ip = ( particle_array(n)%x + 0.5_wp * dx ) * ddx
	833	jp = ( particle_array(n)%y + 0.5_wp * dy ) * ddy
[1929]	834	kp = particle_array(n)%z / dz + 1 + offset_ocean_nzt
[1359]	835
	836	IF ( ip >= nxl .AND. ip <= nxr .AND. jp >= nys .AND. jp <= nyn &
	837	.AND. kp >= nzb+1 .AND. kp <= nzt) THEN ! particle stays on processor
	838	number_of_particles = prt_count(kp,jp,ip)
	839	particles => grid_particles(kp,jp,ip)%particles(1:number_of_particles)
	840
	841	pindex = prt_count(kp,jp,ip)+1
	842	IF( pindex > SIZE(grid_particles(kp,jp,ip)%particles) ) THEN
	843	IF ( pack_done ) THEN
	844	CALL realloc_particles_array (ip,jp,kp)
	845	ELSE
	846	CALL lpm_pack_arrays
	847	prt_count(kp,jp,ip) = number_of_particles
	848	pindex = prt_count(kp,jp,ip)+1
	849	IF ( pindex > SIZE(grid_particles(kp,jp,ip)%particles) ) THEN
	850	CALL realloc_particles_array (ip,jp,kp)
	851	ENDIF
	852	pack_done = .TRUE.
	853	ENDIF
	854	ENDIF
	855	grid_particles(kp,jp,ip)%particles(pindex) = particle_array(n)
	856	prt_count(kp,jp,ip) = pindex
	857	ELSE
[1929]	858	IF ( jp <= nys - 1 ) THEN
[1359]	859	nr_move_south = nr_move_south+1
[1929]	860	!
	861	!-- Before particle information is swapped to exchange-array, check
	862	!-- if enough memory is allocated. If required, reallocate exchange
	863	!-- array.
	864	IF ( nr_move_south > SIZE(move_also_south) ) THEN
	865	!
	866	!-- At first, allocate further temporary array to swap particle
	867	!-- information.
	868	ALLOCATE( temp_ns(SIZE(move_also_south)+NR_2_direction_move) )
	869	temp_ns(1:nr_move_south-1) = move_also_south(1:nr_move_south-1)
	870	DEALLOCATE( move_also_south )
	871	ALLOCATE( move_also_south(SIZE(temp_ns)) )
	872	move_also_south(1:nr_move_south-1) = temp_ns(1:nr_move_south-1)
	873	DEALLOCATE( temp_ns )
	874
	875	ENDIF
	876
[1359]	877	move_also_south(nr_move_south) = particle_array(n)
[1929]	878
[1359]	879	IF ( jp == -1 ) THEN
	880	move_also_south(nr_move_south)%y = &
	881	move_also_south(nr_move_south)%y + ( ny + 1 ) * dy
	882	move_also_south(nr_move_south)%origin_y = &
	883	move_also_south(nr_move_south)%origin_y + ( ny + 1 ) * dy
	884	ENDIF
[1929]	885	ELSEIF ( jp >= nyn+1 ) THEN
[1359]	886	nr_move_north = nr_move_north+1
[1929]	887	!
	888	!-- Before particle information is swapped to exchange-array, check
	889	!-- if enough memory is allocated. If required, reallocate exchange
	890	!-- array.
	891	IF ( nr_move_north > SIZE(move_also_north) ) THEN
	892	!
	893	!-- At first, allocate further temporary array to swap particle
	894	!-- information.
	895	ALLOCATE( temp_ns(SIZE(move_also_north)+NR_2_direction_move) )
	896	temp_ns(1:nr_move_north-1) = move_also_south(1:nr_move_north-1)
	897	DEALLOCATE( move_also_north )
	898	ALLOCATE( move_also_north(SIZE(temp_ns)) )
	899	move_also_north(1:nr_move_north-1) = temp_ns(1:nr_move_north-1)
	900	DEALLOCATE( temp_ns )
	901
	902	ENDIF
	903
[1359]	904	move_also_north(nr_move_north) = particle_array(n)
	905	IF ( jp == ny+1 ) THEN
	906	move_also_north(nr_move_north)%y = &
	907	move_also_north(nr_move_north)%y - ( ny + 1 ) * dy
	908	move_also_north(nr_move_north)%origin_y = &
	909	move_also_north(nr_move_north)%origin_y - ( ny + 1 ) * dy
	910	ENDIF
	911	ELSE
	912	WRITE(0,'(a,8i7)') 'particle out of range ',myid,ip,jp,kp,nxl,nxr,nys,nyn
	913	ENDIF
	914	ENDIF
	915	ENDDO
	916
	917	RETURN
	918
	919	END SUBROUTINE Add_particles_to_gridcell
	920
	921
	922
	923
[1682]	924	!------------------------------------------------------------------------------!
	925	! Description:
	926	! ------------
	927	!> If a particle moves from one grid cell to another (on the current
	928	!> processor!), this subroutine moves the corresponding element from the
	929	!> particle array of the old grid cell to the particle array of the new grid
	930	!> cell.
	931	!------------------------------------------------------------------------------!
[1359]	932	SUBROUTINE lpm_move_particle
	933
	934	IMPLICIT NONE
	935
[1929]	936	INTEGER(iwp) :: i !< grid index (x) of particle position
	937	INTEGER(iwp) :: ip !< index variable along x
	938	INTEGER(iwp) :: j !< grid index (y) of particle position
	939	INTEGER(iwp) :: jp !< index variable along y
	940	INTEGER(iwp) :: k !< grid index (z) of particle position
	941	INTEGER(iwp) :: kp !< index variable along z
	942	INTEGER(iwp) :: n !< index variable for particle array
	943	INTEGER(iwp) :: np_old_cell !< number of particles per grid box before moving
	944	INTEGER(iwp) :: n_start !< start index
	945	INTEGER(iwp) :: pindex !< dummy argument for number of new particle per grid box
[1359]	946
[1682]	947	LOGICAL :: pack_done !<
[1359]	948
[1929]	949	TYPE(particle_type), DIMENSION(:), POINTER :: particles_old_cell !< particles before moving
[1359]	950
	951	CALL cpu_log( log_point_s(41), 'lpm_move_particle', 'start' )
	952
	953	DO ip = nxl, nxr
	954	DO jp = nys, nyn
	955	DO kp = nzb+1, nzt
	956
	957	np_old_cell = prt_count(kp,jp,ip)
	958	IF ( np_old_cell <= 0 ) CYCLE
	959	particles_old_cell => grid_particles(kp,jp,ip)%particles(1:np_old_cell)
	960	n_start = -1
	961
	962	DO n = 1, np_old_cell
	963	i = ( particles_old_cell(n)%x + 0.5_wp * dx ) * ddx
	964	j = ( particles_old_cell(n)%y + 0.5_wp * dy ) * ddy
	965	k = particles_old_cell(n)%z / dz + 1 + offset_ocean_nzt
	966	!
	967	!-- Check, if particle has moved to another grid cell.
	968	IF ( i /= ip .OR. j /= jp .OR. k /= kp ) THEN
	969	!
	970	!-- The particle has moved to another grid cell. Now check, if
	971	!-- particle stays on the same processor.
	972	IF ( i >= nxl .AND. i <= nxr .AND. j >= nys .AND. &
	973	j <= nyn .AND. k >= nzb+1 .AND. k <= nzt) THEN
	974	!
	975	!-- If the particle stays on the same processor, the particle
	976	!-- will be added to the particle array of the new processor.
	977	number_of_particles = prt_count(k,j,i)
	978	particles => grid_particles(k,j,i)%particles(1:number_of_particles)
	979
	980	pindex = prt_count(k,j,i)+1
	981	IF ( pindex > SIZE(grid_particles(k,j,i)%particles) ) &
	982	THEN
	983	n_start = n
	984	EXIT
	985	ENDIF
	986
	987	grid_particles(k,j,i)%particles(pindex) = particles_old_cell(n)
	988	prt_count(k,j,i) = pindex
	989
	990	particles_old_cell(n)%particle_mask = .FALSE.
	991	ENDIF
	992	ENDIF
	993	ENDDO
	994
[1691]	995	IF ( n_start >= 0 ) THEN
[1359]	996	pack_done = .FALSE.
	997	DO n = n_start, np_old_cell
	998	i = ( particles_old_cell(n)%x + 0.5_wp * dx ) * ddx
	999	j = ( particles_old_cell(n)%y + 0.5_wp * dy ) * ddy
	1000	k = particles_old_cell(n)%z / dz + 1 + offset_ocean_nzt
	1001	IF ( i /= ip .OR. j /= jp .OR. k /= kp ) THEN
	1002	!
	1003	!-- Particle is in different box
	1004	IF ( i >= nxl .AND. i <= nxr .AND. j >= nys .AND. &
	1005	j <= nyn .AND. k >= nzb+1 .AND. k <= nzt) THEN
	1006	!
	1007	!-- Particle stays on processor
	1008	number_of_particles = prt_count(k,j,i)
	1009	particles => grid_particles(k,j,i)%particles(1:number_of_particles)
	1010
	1011	pindex = prt_count(k,j,i)+1
	1012	IF ( pindex > SIZE(grid_particles(k,j,i)%particles) ) &
	1013	THEN
	1014	IF ( pack_done ) THEN
	1015	CALL realloc_particles_array(i,j,k)
	1016	ELSE
	1017	CALL lpm_pack_arrays
	1018	prt_count(k,j,i) = number_of_particles
	1019	!
	1020	!-- If number of particles in the new grid box
	1021	!-- exceeds its allocated memory, the particle array
	1022	!-- will be reallocated
	1023	IF ( pindex > SIZE(grid_particles(k,j,i)%particles) ) THEN
	1024	CALL realloc_particles_array(i,j,k)
	1025	ENDIF
	1026
	1027	pack_done = .TRUE.
	1028	ENDIF
	1029	ENDIF
	1030
	1031	grid_particles(k,j,i)%particles(pindex) = particles_old_cell(n)
	1032	prt_count(k,j,i) = pindex
	1033
	1034	particles_old_cell(n)%particle_mask = .FALSE.
	1035	ENDIF
	1036	ENDIF
	1037	ENDDO
	1038	ENDIF
	1039	ENDDO
	1040	ENDDO
	1041	ENDDO
	1042
	1043	CALL cpu_log( log_point_s(41), 'lpm_move_particle', 'stop' )
	1044
	1045	RETURN
	1046
	1047	END SUBROUTINE lpm_move_particle
	1048
[1682]	1049	!------------------------------------------------------------------------------!
	1050	! Description:
	1051	! ------------
[1929]	1052	!> If the allocated memory for the particle array do not suffice to add arriving
	1053	!> particles from neighbour grid cells, this subrouting reallocates the
	1054	!> particle array to assure enough memory is available.
[1682]	1055	!------------------------------------------------------------------------------!
[1359]	1056	SUBROUTINE realloc_particles_array (i,j,k,size_in)
	1057
	1058	IMPLICIT NONE
	1059
[1682]	1060	INTEGER(iwp), INTENT(in) :: i !<
	1061	INTEGER(iwp), INTENT(in) :: j !<
	1062	INTEGER(iwp), INTENT(in) :: k !<
[1822]	1063	INTEGER(iwp), INTENT(in), OPTIONAL :: size_in !<
[1359]	1064
[1682]	1065	INTEGER(iwp) :: old_size !<
	1066	INTEGER(iwp) :: new_size !<
	1067	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: tmp_particles_d !<
	1068	TYPE(particle_type), DIMENSION(500) :: tmp_particles_s !<
[1359]	1069
	1070	old_size = SIZE(grid_particles(k,j,i)%particles)
	1071
	1072	IF ( PRESENT(size_in) ) THEN
	1073	new_size = size_in
	1074	ELSE
[1822]	1075	new_size = old_size * ( 1.0_wp + alloc_factor / 100.0_wp )
[1359]	1076	ENDIF
	1077
[1929]	1078	new_size = MAX( new_size, min_nr_particle, old_size + 1 )
[1359]	1079
	1080	IF ( old_size <= 500 ) THEN
	1081
	1082	tmp_particles_s(1:old_size) = grid_particles(k,j,i)%particles(1:old_size)
	1083
	1084	DEALLOCATE(grid_particles(k,j,i)%particles)
	1085	ALLOCATE(grid_particles(k,j,i)%particles(new_size))
	1086
	1087	grid_particles(k,j,i)%particles(1:old_size) = tmp_particles_s(1:old_size)
	1088	grid_particles(k,j,i)%particles(old_size+1:new_size) = zero_particle
	1089
	1090	ELSE
	1091
	1092	ALLOCATE(tmp_particles_d(new_size))
	1093	tmp_particles_d(1:old_size) = grid_particles(k,j,i)%particles
	1094
	1095	DEALLOCATE(grid_particles(k,j,i)%particles)
	1096	ALLOCATE(grid_particles(k,j,i)%particles(new_size))
	1097
	1098	grid_particles(k,j,i)%particles(1:old_size) = tmp_particles_d(1:old_size)
	1099	grid_particles(k,j,i)%particles(old_size+1:new_size) = zero_particle
	1100
	1101	DEALLOCATE(tmp_particles_d)
	1102
	1103	ENDIF
	1104	particles => grid_particles(k,j,i)%particles(1:number_of_particles)
	1105
	1106	RETURN
	1107	END SUBROUTINE realloc_particles_array
	1108
[1936]	1109
	1110
	1111
	1112
	1113	SUBROUTINE dealloc_particles_array
	1114
	1115	IMPLICIT NONE
	1116
	1117	INTEGER(iwp) :: i
	1118	INTEGER(iwp) :: j
	1119	INTEGER(iwp) :: k
	1120	INTEGER(iwp) :: old_size !<
	1121	INTEGER(iwp) :: new_size !<
	1122
	1123	LOGICAL :: dealloc
	1124
	1125	TYPE(particle_type), DIMENSION(:), ALLOCATABLE :: tmp_particles_d !<
	1126	TYPE(particle_type), DIMENSION(500) :: tmp_particles_s !<
	1127
	1128	DO i = nxl, nxr
	1129	DO j = nys, nyn
	1130	DO k = nzb+1, nzt
	1131	!
	1132	!-- Determine number of active particles
	1133	number_of_particles = prt_count(k,j,i)
	1134	!
	1135	!-- Determine allocated memory size
	1136	old_size = SIZE( grid_particles(k,j,i)%particles )
	1137	!
	1138	!-- Check for large unused memory
	1139	dealloc = ( ( number_of_particles < min_nr_particle .AND. &
	1140	old_size > min_nr_particle ) .OR. &
	1141	( number_of_particles > min_nr_particle .AND. &
	1142	old_size - number_of_particles * &
	1143	( 1.0_wp + 0.01_wp * alloc_factor ) > 0.0_wp ) )
	1144
	1145
	1146	IF ( dealloc ) THEN
	1147	IF ( number_of_particles < min_nr_particle ) THEN
	1148	new_size = min_nr_particle
	1149	ELSE
	1150	new_size = INT( number_of_particles * ( 1.0_wp + 0.01_wp * alloc_factor ) )
	1151	ENDIF
	1152
	1153	IF ( number_of_particles <= 500 ) THEN
	1154
	1155	tmp_particles_s(1:number_of_particles) = grid_particles(k,j,i)%particles(1:number_of_particles)
	1156
	1157	DEALLOCATE(grid_particles(k,j,i)%particles)
	1158	ALLOCATE(grid_particles(k,j,i)%particles(new_size))
	1159
	1160	grid_particles(k,j,i)%particles(1:number_of_particles) = tmp_particles_s(1:number_of_particles)
	1161	grid_particles(k,j,i)%particles(number_of_particles+1:new_size) = zero_particle
	1162
	1163	ELSE
	1164
	1165	ALLOCATE(tmp_particles_d(number_of_particles))
	1166	tmp_particles_d(1:number_of_particles) = grid_particles(k,j,i)%particles(1:number_of_particles)
	1167
	1168	DEALLOCATE(grid_particles(k,j,i)%particles)
	1169	ALLOCATE(grid_particles(k,j,i)%particles(new_size))
	1170
	1171	grid_particles(k,j,i)%particles(1:number_of_particles) = tmp_particles_d(1:number_of_particles)
	1172	grid_particles(k,j,i)%particles(number_of_particles+1:new_size) = zero_particle
	1173
	1174	DEALLOCATE(tmp_particles_d)
	1175
	1176	ENDIF
	1177
	1178	ENDIF
	1179	ENDDO
	1180	ENDDO
	1181	ENDDO
	1182
	1183	END SUBROUTINE dealloc_particles_array
	1184
	1185
[1359]	1186	END MODULE lpm_exchange_horiz_mod

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